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M1.4 Depth: 33.8 km

M1.4 Earthquake near 4 km ESE of Big Lake, Alaska (United States)

UTC time: 2025-09-21 04:20:39 UTC Local time: —

About this earthquake

On September 21, 2025 at 04:20 UTC, a magnitude M1.4 earthquake occurred near 4 km ESE of Big Lake, Alaska (United States). The hypocenter lay relatively close to the surface at around 34 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 167 earthquakes, the strongest at M3.7.

Details

Magnitude
M1.4
Depth
33.8 km
UTC time
2025-09-21 04:20:39 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
61.50110, -149.87670
Temperature
9.6°C

Map

Depth profile

Depth profile Depth: 33.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 33.8 km
Shallow
33.8 km
33.8 km — deeper than the regional average (15.4 km)
Regional average: 15.4 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

  • Spurr
    Distance: 128 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Hayes
    Distance: 135 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Redoubt
    Distance: 191 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 239 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Buzzard Creek
    Distance: 294 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Augustine
    Distance: 308 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States

Historic earthquake map · United States

Open history map
Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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